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首页> 外文期刊>Theoretical and applied climatology >Variation of atmospheric aerosol optical depth and its relationship with climate change in China east of 100°E over the last 50 years
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Variation of atmospheric aerosol optical depth and its relationship with climate change in China east of 100°E over the last 50 years

机译：近50年来中国东部100°E以内的大气气溶胶光学深度变化及其与气候变化的关系

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摘要

Understanding the role of aerosols in global and regional climate change requires the long-term measurements of aerosol optical properties. We use an indirect method to infer aerosol optical depths (AODs) based on atmospheric visibility and water vapor pressure measured at 504 key climate stations in eastern China (east of 100° E) over 1951-2002. Inferred AODs are compared with the MODIS satellite measurements for year of 2002. Results show that AODs averaged over 1951-2000 exhibit large values in Sichuan Basin and Changjiang River Delta, and there are two belts of high AODs, one from Beijing to South China by the middle reaches of Changjiang River and the other from Beijing to Changjiang Delta. Inferred AODs in eastern China show the lowest value in 1960s, increase dramatically in 1980s, and reach maximum in 1990s. The ratios of the regional and decadal mean AOD in 1950s, 1960s, 1970s, 1980s, and 1990s to that in 1960s are 1.085, 1.0, 1.066, 1.195, and 1.22, respectively. Statistical analysis shows that variations in AODs correlate with the changes in precipitation and air temperature in eastern rnChina over the past 50 years. Correlation coefficients between annual mean AOD and precipitation are 0.39, 0.37, and 0.57 in the upper (Sichuan Basin), middle, and lower reaches of the Changjiang River, respectively. In the Sichuan Basin, the increase in annual mean AOD correlates with the reduction in air temperature with a correlation coefficient of -0.33 at 95% confidence level.
机译：要了解气溶胶在全球和区域气候变化中的作用，就需要对气溶胶光学特性进行长期测量。我们使用间接方法，根据大气能见度和水汽压来推断气溶胶光学深度（AOD），该气溶胶光学深度是在1951-2002年间在中国东部（东部100°E以东）的504个关键气候站测量的。将推断出的AOD值与2002年的MODIS卫星测量值进行比较。结果表明，在1951-2000年期间，平均AOD值在四川盆地和长江三角洲表现出较大的价值，并且有两条高AOD值带，一条从北京到华南。长江中游，北京到长江三角洲。中国东部地区推断的AOD值在1960年代最低，在1980年代急剧增加，在1990年代达到最大值。 1950年代，1960年代，1970年代，1980年代和1990年代的区域和年代际平均AOD比率与1960年代的比率分别为1.085、1.0、1.066、1.195和1.22。统计分析表明，过去50年中，华东地区的AOD值变化与降水和气温变化有关。长江上游（四川盆地），中游和下游的年平均AOD与降水的相关系数分别为0.39、0.37和0.57。在四川盆地，年平均AOD的增加与气温的降低相关，在95％置信度下的相关系数为-0.33。

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  • 来源
    《Theoretical and applied climatology》 |2009年第2期|191-199|共9页
  • 作者

    L.-X. Chen; B. Zhang; W.-Q. Zhu; X.-J. Zhou; Y.-F. Luo; Z.-J. Zhou; J.-H. He;

  • 作者单位

    Chinese Academy of Meteorological Sciences,Beijing 100081, China;

    Nanjing University of Information Science & Technology,Nanjing 210044, China;

    Chinese Academy of Meteorological Sciences,Beijing 100081, China;

    National Meteorological Center,Beijing 100081, China;

    National Natural Science Foundation of China,Beijing 100085, China;

    National Meteorological Center,Beijing 100081, China;

    Nanjing University of Information Science & Technology,Nanjing 210044, China;

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